Alloy 205，Nickel 205 Foil，Shim，UNS N02205，EFORU

British Specs:，American Specs:AMS 5555 Wire and Ribbon MIL-N-46025，German Specs:

### Technical Datasheet: Nickel 205 Foil & Shim Stock (UNS N02205) #### 1. Product Overview **Nickel 205 Foil and Shim Stock** are thin-gauge forms of nickel alloy with controlled magnesium addition (0.01-0.10%), specifically designed for applications requiring enhanced oxidation resistance at elevated temperatures. These precision-rolled products maintain the excellent corrosion resistance of nickel while offering superior high-temperature performance compared to standard Nickel 200/201 foils and shims. **Foil** is typically supplied in thicknesses from 0.001" to 0.005" (0.025 mm to 0.127 mm), while **Shim Stock** generally ranges from 0.006" to 0.030" (0.15 mm to 0.76 mm). The magnesium addition provides improved oxidation resistance, making these materials ideal for high-temperature electrical, electronic, and industrial applications where reliability in oxidizing atmospheres is critical. #### 2. Chemical Composition (% Weight) | Element | Content (%) (ASTM B162) | Content (%) (Typical Foil/Shim) | | :--- | :--- | :--- | | **Nickel (Ni)** | 99.0 min | ≥ 99.0 | | **Magnesium (Mg)** | **0.01 - 0.10** | **0.03 - 0.06** | | **Carbon (C)** | 0.15 max | 0.08 | | **Manganese (Mn)** | 0.35 max | 0.18 | | **Iron (Fe)** | 0.40 max | 0.15 | | **Copper (Cu)** | 0.25 max | 0.10 | | **Silicon (Si)** | 0.35 max | 0.12 | | **Sulfur (S)** | 0.01 max | 0.003 | #### 3. Physical Properties | Property | Metric Unit | Imperial Unit | | :--- | :--- | :--- | | **Density** | 8.89 g/cm³ | 0.321 lb/in³ | | **Melting Point** | 1435-1445 °C | 2615-2633 °F | | **Thermal Conductivity** (at 25°C) | 69 W/m·K | 478 BTU·in/hr·ft²·°F | | **Electrical Resistivity** | 0.096 µΩ·m | 36.8 µΩ·in | | **Modulus of Elasticity** | 186 GPa | 27 x 10⁶ psi | | **Thermal Expansion Coefficient** (20-100°C) | 13.3 µm/m·°C | 7.4 x 10⁻⁶ in/in·°F | | **Curie Temperature** | ~ 360 °C | ~ 680 °F | #### 4. Mechanical Properties Properties vary significantly with temper and thickness: **Annealed (Soft) Temper:** * **Tensile Strength:** 350 - 450 MPa (51 - 65 ksi) * **Yield Strength (0.2% Offset):** 110 - 180 MPa (16 - 26 ksi) * **Elongation:** 45 - 60% **Hard Temper:** * **Tensile Strength:** 620 - 760 MPa (90 - 110 ksi) * **Yield Strength (0.2% Offset):** 550 - 690 MPa (80 - 100 ksi) * **Elongation:** 2 - 15% #### 5. Standard Thickness Ranges & Tolerances **Foil:** * **Metric:** 0.025 mm to 0.127 mm (±0.002 mm) * **Imperial:** 0.001" to 0.005" (±0.0001") **Shim Stock:** * **Metric:** 0.15 mm to 0.76 mm (±0.005 mm) * **Imperial:** 0.006" to 0.030" (±0.0002") #### 6. International Standards | Standard Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM International** | **ASTM B162** | Nickel Plate, Sheet, and Strip | | **ASTM International** | **ASTM B906** | General Requirements for Flat-Rolled Nickel | | **ASME** | **SB-162** | Nickel Plate, Sheet, and Strip | | **SAE Aerospace** | **AMS 5556** | Sheet, Strip, and Plate | | **UNS** | **N02205** | Unified Numbering System | | **IEC** | **IEC 60121** | Electronic Grade Nickel Alloys | #### 7. Key Characteristics & Advantages * **Enhanced Oxidation Resistance:** Superior protection against high-temperature oxidation up to 650°C (1200°F) * **Precision Thickness Control:** Maintains tight thickness tolerances for critical applications * **Excellent Formability:** Can be easily stamped, blanked, and formed into complex shapes * **Superior Surface Quality:** Available with various surface finishes (matte, bright, polished) * **Good Weldability:** Suitable for resistance welding and laser welding techniques * **Stable Electrical Properties:** Maintains consistent electrical characteristics at elevated temperatures * **High Temperature Stability:** Minimal dimensional change during thermal cycling #### 8. Temperature Capability * **Maximum Continuous Service:** **650°C (1200°F)** * **Intermittent Service:** Up to 870°C (1600°F) for short durations * **Optimal Performance Range:** 300-600°C (572-1112°F) * **Minimum Service Temperature:** -196°C (-321°F) #### 9. Product Applications **High-Temperature Electronics:** * Lead frames for high-temperature semiconductors * Electronic shielding in oxidizing environments * High-temperature battery components and contacts * Thick film and thin film substrates **Electrical Applications:** * Resistance welding tips and electrodes * High-temperature electrical contacts * Ceramic-to-metal seals * Electrical insulation components **Aerospace & Defense:** * High-temperature gaskets and seals * Shimming components for elevated temperature applications * Thermal management materials * Sensor and instrumentation components **Industrial Applications:** * High-temperature furnace gaskets * Precision shims for thermal equipment * Brazing preforms and filler metal carriers * Chemical processing equipment liners **Specialized Applications:** * Nuclear instrumentation components * Medical device components requiring repeated sterilization * Vacuum system components * High-temperature sensor elements #### 10. Quality Assurance & Testing * **Dimensional Verification:** Laser scanning and micrometer measurement * **Surface Quality:** Visual inspection and surface roughness measurement * **Mechanical Testing:** Tensile testing and hardness measurement * **Electrical Testing:** Conductivity and resistivity verification * **Certification:** Mill test certificates with full traceability --- **Disclaimer:** The technical information provided is for reference purposes. Actual properties may vary based on manufacturing process, thickness, temper, and heat treatment. Users should conduct appropriate testing to verify suitability for specific high-temperature applications. Consult with materials engineers for critical applications involving elevated temperature service.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1661 gallon liquid totes Special package is available on request.